Rolling mills for rolling fragmentary metal into sheets, rods, wire or the like



Oct. 5, 1965 K. CLAUS 3,209,403

ROLLING MILLS FOR ROLLING FRAGMENTARY METAL INTO SHEETS, RODS, WIRE OR THE LIKE Original Filed Nov. 7, 1962 INVENTOR Ku H 674 (/6 ATTORNEYS United States Patent 3,209,403 ROLLING MILLS FOR ROLLING FRAGMENTARY METAL INTO SHEETS, RODS, WIRE OR THE LIKE Kurt Claus, Metzkausen, near Dusseldorf, Germany, as-

signor to Schloemann Aktiengesellschaft, Dusseldorf, Germany, a German company Original application Nov. 7, 1962, Ser. No. 236,067. Divided and this application Mar. 15, 1965, Ser. No. 439,862 Claims priority, application Germany, Nov. 11, 1961, Sch 30,550; Nov. 15, 1961, Sch 30,566 4 Claims. (Cl. 189) This application is a division of application Ser. No. 236,067, filed November 7, 1962.

This invention relates to a rolling mill for rolling coarse or fine pieces of metal, for instance powder, into sheets, rods, wire or the like, the rolling mill being provided with means for adjusting the temperature of the working surfaces that act upon the stock that is being rolled.

The object of the invention is to obtain, individually or in combination, the following advantages: the temperature of the surfaces that come into direct ocntact with the stock is to be adjustable, that is to say, these surfaces are to be capable of being cooled so far, during operation, by special devices, that they do not exceed a definite temperature. In addition, the possibility is provided of heating these surfaces under certain circumstances. This becomes necessary when the rolling mill has been out of operation for a time and is to be brought into operation again. Furthermore it is an object of the invention to prevent heating of the rolls. Moreover the stock that is being rolled must be prevented from sticking to the surfaces that are treating the stock. Finally, any heating or cooling medium employed, whether liquid or gaseous, must not come into contact with the stock; for if portions of liquid or of certain gaseous fluids lodge between the individual particles of the stock, there is the risk that these portions may become embedded therein during the rolling, and may then exert, even after the rolling, a disadvantageous chemical or metallurgical influence upon the rolled stock.

For the purpose of attaining some or all of the said aims, the invention consists in the feature that a band passes round each roll of the rolling mill, in the region of its entry angle or nip, and that the working surfaces of the bands, at least in the regions that come into contact with the stock that is being rolled, are free from constituents of any fluid (liquid or gaseous) employed for instance as a heating or cooling agent.

The temperature of the surfaces of the bands may be adjusted by tempering appliances, such as water-jet nozzles or heating burners, acting upon the roll surfaces, so that the tempering of the working surfaces of the bands is effected indirectly as the bands come into contact with the tempered roll surfaces.

Another embodiment of the invention consists in the appliances for tempering the working surfaces that act upon the stock being arranged to one side of the rolls, where they act upon the bands travelling past them.

If bands made of metal, steel for example, are employed, the tempering appliances that serve for heating them may be induction coils, which, when an electric 3,209,403 Patented Oct. 5, 1965 cburrgnt flows through them, effect the heating of the an s.

Another possible solution consists in the tempering applicances directing cool or warm fluid (for instance gas or water) on to the side of the band remote from the working surface of the band, and outside that region in which the bands bear on the rolls.

One constructional example of the invention is diagrammatically illustrated by the accompanying drawing.

In the embodiment illustrated, bands 33 and 34 pass around the rolls 31 and 32. The metal powder 35 is engaged by the bands 33 and 34, and is rolled out into a strip by the pressure of the rolls 31 and 32. Spraying nozzles 36 spray the rolls 31 and 32 with cooling medium. Burners 37 may preheat the rolls. Instead of the spraying nozzles 36, or even in addition to them, spraying nozzles 38 may be provided, which spray the bands with cooling medium on the side remote from the stock. Bumers 39 may heat the bands by directing flames on to the inner sides of the bands.

I claim:

1. A rolling mill including a pair of opposed working rolls, an endless movable band engaging a portion of the surface of one working roll and trained over an idler roll to provide spaced runs, a second endless movable band engaging a portion of the surface of the other workingroll and trained over a second idler roll to provide spaced runs, means for feeding metal particles heated to a relatively high temperature between said working rolls in engagement with the outer surfaces of said bands to form a metal body, and nozzles disposed adjacent the portion of the surface of each working roll out of engagement with the associated band for spraying a cooling medium on the surface of each working roll between the runs of each band.

2. A rolling mill as defined in claim 1, and including heating burners for directly heating a portion of the surface of each working roll between the runs of each band.

3. A rolling mill including a pair of opposed working rolls, an endless movable band engaging a portion of the surface of one working roll and trained over an idler roll to provide spaced runs, a second endless movable band engaging a portion of the surface of the other working roll and trained over a second idler roll to provide spaced runs, means for feeding metal particles heated to a relatively high temperature between said working rolls in engagement with the outer surfaces of said bands to form a metal body and nozzles disposed adjacent the portion of the inner surface of each band moving away from said working rolls for spraying a cooling medium on the inner surface of the run of each band moving away from said working rolls.

4. A rolling mill as defined in claim 3, and including heating burners disposed adjacent the inner surface of each band following said nozzles for directly heating the the run of each band moving toward said working rolls.

No references cited.

WILLIAM J. STEPHENSON, Primary Examiner. 

1. A ROLLING MILL INCLUDING A PAIR OF OPPOSED WORKING ROLLS, AN ENDLESS MOVABLE BAND ENGAGING A PORTION OF THE SURFACE OF ONE WORKING ROLL AND TRAINED OVER AN IDLER ROLL TO PROVIDE SPACED RUNS, A SECOND ENDLESS MOVABLE BAND ENGAGING A PORTION OF THE SURFACE OF THE OTHER WORKING ROLL AND TRAINED OVER A SECOND IDLER ROLL TO PROVIDE SPACED RUNS, MEANS FOR FEEDING METAL PARTICLES HEATED TO A RELATIVELY HIGH TEMPERATURE BETWEEN SAID WORKING ROLLS IN ENGAGEMENT WITH THE OUTER SURFACES OF SAID BANDS TO FORM A METAL BODY, AND NOZZLES DISPOSED ADJACENT THE PORTION OF THE SURFACE OF EACH WORKING ROLL OUT OF ENGAGEMENT WITH THE ASSOCIATED BAND FOR SPRAYING A COOLING MEDIUM ON THE SURFACE OF EACH WORKING ROLL BETWEEN THE RUNS OF EACH BAND. 